<template>
	<view class="searchLayout">
			<view class="search">
				<uni-search-bar 
				@confirm="onSearch"
				@cancel="onClear"
				@clear="onClear"
				focus 
				placeholder="搜索"
				v-model="queryParams.keyword">
				</uni-search-bar>
			</view>
			
			
			<view v-if="!classList.length">
				<view class="history" v-if="historySearch.length">
					<view class="topTitle">
						<view class="text">最近搜索</view>
						<view class="icon" @click="removeHistory">
							<uni-icons type="trash" size="25"></uni-icons>
						</view>
					</view>
					<view class="tabs">
						<view class="tab" v-for="tab in historySearch" :key="tab" @click="clickTab(tab)">{{tab}}</view>		
					</view>
				</view>
				
				<view class="recommend">
					<view class="topTitle">
						<view class="text">热门搜索</view>				
					</view>
					<view class="tabs">				
						<view class="tab" v-for="tab in recommendList" :key="tab" @click="clickTab(tab)">{{tab}}</view>
					</view>
				</view>
			</view>
			
			
			<view class="noSearch" v-if="noSearch">
				<uv-empty mode="search" icon="http://cdn.uviewui.com/uview/empty/search.png"></uv-empty>
			</view>
			
			
			<view v-else>
				<view class="list" >
					<navigator :url="`/pages/preview/preview?id=${item._id}`"  class="item" 
					v-for="item in classList" :key="item._id">				
						<image :src="item.smallPicurl" mode="aspectFill"></image>				
					</navigator>
				</view>		
				<view class="loadingLayout" v-if="noData || classList.length"><uni-load-more :status="noData?'noMore':'loading'"/></view>
			</view>
			
			
		</view>
</template>

<script setup>
import {ref} from "vue";
import {onLoad,onUnload,onReachBottom} from "@dcloudio/uni-app";
import {apiSearchData} from '@/apis/index.js'

//查询参数
const queryParams = ref({	
	pageNum:1,
	pageSize:12,
	keyword:""
})

//搜索历史词
const historySearch = ref(uni.getStorageSync('historySearch') || []);

//热门搜索词
const recommendList = ref(["美女","帅哥","宠物","卡通"]);

//没有更多
const noData = ref(false);
//没有搜索结果
const noSearch = ref(false);

//搜索结果列表
const classList = ref([]);


//点击搜索
const onSearch = ()=>{
	uni.showLoading()
	historySearch.value =[...new Set([queryParams.value.keyword,...historySearch.value])].slice(0,10)
	uni.setStorageSync("historySearch",historySearch.value)
	initParams(queryParams.value.keyword)
	searchData();
	console.log(queryParams.value.keyword);
}

//点击清除按钮
const onClear = ()=>{
	initParams()
}



//点击标签进行搜索
const clickTab = (value)=>{
	initParams(value)
	onSearch()
}


//点击清空搜索记录
const removeHistory = ()=>{
	uni.showModal({
		title:"是否清空历史搜索？",
		success:res=>{
			if(res.confirm){
				console.log("确认删除");	
				uni.removeStorageSync("historySearch");
				historySearch.value = []
			}
		}
	})
}


const searchData = async()=>{
	try{
		const res = await apiSearchData(queryParams.value)
		classList.value = [...classList.value,...res.data.data];
		uni.setStorageSync("storgClassList",classList.value)
		if(queryParams.value.pageSize > res.data.data.length) noData.value = true;
		if(res.data.data.length == 0 && classList.value.length ==0) noSearch.value = true
		console.log(res);
	}finally{
		uni.hideLoading()
	}

}

const initParams =(value= '')=>{
	classList.value = [];
	noData.value = false
	noSearch.value = false
	queryParams.value ={
		pageNum:1,
		pageSize:12,
		keyword:value || ""
	}
}

//触底加载更多
onReachBottom(()=>{
	if(noData.value) return;
	queryParams.value.pageNum++
	searchData();
})

//关闭有页面
onUnload(()=>{
	uni.removeStorageSync("storgClassList",classList.value)
})


</script>

<style lang="scss" scoped>
.searchLayout{
	.search{
		padding:0 10rpx;
	}
	.topTitle{
		display: flex;
		justify-content: space-between;
		align-items: center;
		font-size: 32rpx;
		color:#999;
	}
	.history{
		padding:30rpx;		
	}
	.recommend{
		padding:30rpx;
	}
	.tabs{
		display: flex;		
		align-items: center;
		flex-wrap: wrap;
		padding-top:20rpx;
		.tab{
			background: #F4F4F4;
			font-size: 28rpx;
			color:#333;
			padding:10rpx 28rpx;
			border-radius: 50rpx;
			margin-right: 20rpx;
			margin-top: 20rpx;
		}
	}	
	.list{
		display: grid;
		grid-template-columns: repeat(3,1fr);
		gap: 5rpx;
		padding:20rpx 5rpx;		
		.item{
			height: 440rpx;
			image{
				width: 100%;
				height: 100%;
				display: block;
			}			
		}		
	}
}
</style>
